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  • Title: Admixture determines genetic diversity and population differentiation in the biological invasion of a lizard species.
    Author: Kolbe JJ, Larson A, Losos JB, de Queiroz K.
    Journal: Biol Lett; 2008 Aug 23; 4(4):434-7. PubMed ID: 18492644.
    Abstract:
    Molecular genetic analyses show that introduced populations undergoing biological invasions often bring together individuals from genetically disparate native-range source populations, which can elevate genotypic variation if these individuals interbreed. Differential admixture among multiple native-range sources explains mitochondrial haplotypic diversity within and differentiation among invasive populations of the lizard Anolis sagrei. Our examination of microsatellite variation supports the hypothesis that lizards from disparate native-range sources, identified using mtDNA haplotypes, form genetically admixed introduced populations. Furthermore, within-population genotypic diversity increases with the number of sources and among-population genotypic differentiation reflects disparity in their native-range sources. If adaptive genetic variation is similarly restructured, then the ability of invasive species to adapt to new conditions may be enhanced.
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